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Re: Turbo 350 In A 88 GMC???
A couple things come to mind. First, if this truck is an original automatic truck, it would have came with a 700R4. Connecting the kick down cable for the TH350 to the same position that the 700R4 TV cable was, likely is going to not be good for the TH350. The two cables perform completely different functions. Secondly, is the vacuum modulator connected to manifold vacuum? The quick shifting is likely a governor issue. Thirdly, if there is not an external VSS sender on the speedo connection of the TH350, to send a signal to the ECM, the engine will not run right.
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